How we save the planet is clear: we need to prevent global temperatures from rising more than 1.5 degrees in order to avoid doing irreversible damage. But exactly what should we do to reduce damaging greenhouse gas emissions? In recent years, hydrogen has emerged as a promising source of clean energy. It has been called ‘freedom fuel’, the ‘Swiss army knife’ of the energy transition, and a ‘silver bullet’ for decarbonisation. But is it as simple as that? In this debate we separate fact from fiction with energy experts Barry Carruthers, hydrogen director of ScottishPower; Fiona Harvey, The Guardian’s environment correspondent; and Professor Nigel Brandon, Chair in Sustainable Development in Energy at Imperial College London. Chairing the debate is Kamal Ahmed, journalist, author and former BBC News Editorial Director. Learn more about your ad choices. Visit podcastchoices.com/adchoices